Helixanthera lambertiana (Schult.f.) Rajasek. in J. Econ. Taxon. Bot. 31(1): 183. 2007. Loranthus lambertianus Schult.f., Syst. Veg. 7: 118. 1829; Hook.f., Fl. Brit. India 5: 223. 1886. Hyphear lambertianum (Schult.f.) Danser in Bull. Jard. Bot. Buitenzorg, Ser. 3, 10: 319. 1929.

Branches glabrous, pseudo-dichotomously branched. Leaves opposite, elliptic-lanceolate to obovate, attenuating at both ends, somewhat decurrent towards base, subacute at apex, 6 - 6.5 x 1 - 2.2 cm, coriaceous, glabrous; lateral nerves 4 - 6 pairs, palmati-pinnate; petioles 3 - 5 mm long. Inflorescences terminal, spicate; peduncle solitary, 4 or 5-flowered, glabrous, 1.7 - 2.2 cm long. Flowers sessile, inserted in foveola of axis, 5-merous, glabrous; bracts lunate, ca 0.2 mm long, reddish brown. Petals 5, linear-oblong, up to 3.5 cm long. Stamens 5, erect; filaments 2.5 - 3 mm long; anthers linear-oblong, with two pairs of thecae, ca 2.5 mm long. Ovary globose; style tetragonous. Fruits ovoid, glabrous, smooth, ca 4.2 x 3.5 mm.

Fl. & Fr. Period unknown.

Distrib. India: Temperate Himalayas, at 2000 - 2600 m altitude. Sikkim.

Endemic.

Notes. This species has been included as one among the doubtful and excluded species by J. D. Hooker (Fl. Brit. India 5: 223. 1886). It is distinguishable by its Viscum-like habit, glabrous nature of the entire plant, terminal spikes and pentamerous large bisexual flowers.

Vessel with scalariform opposite pittings; fibres of special type, excessively thick-walled with or without slit-like discontinuous lumen with ramiform pits in the lateral walls with fairly large narrowly elliptic apertures which are criss-crossing.